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Wednesday, May 7, 2008

Sleep paralysis is a condition characterized by temporary paralysis of the body shortly after waking up (known as hypnopompic paralysis) or, less often, shortly before falling asleep (known as hypnagogic paralysis).

Physiologically, it is closely related to the paralysis that occurs as a natural part of REM (rapid eye movement) sleep, which is known as REM atonia. Sleep paralysis occurs when the brain awakes from a REM state, but the bodily paralysis persists. This leaves the person fully conscious, but unable to move. In addition, the state may be accompanied by terrifying hallucinations (hypnopompic or hypnagogic) which cause an acute sense of danger. Sleep paralysis is particularly frightening to the individual due to the vividness of such hallucinations.

The hallucinatory element to sleep paralysis makes it even more likely that someone will interpret the experience as a dream, since completely fanciful, or dream-like, objects may appear in the room alongside one's normal vision. Some scientists have proposed this condition as a theory for alien abductions and ghostly encounters.

The paralysis can last from several seconds to several minutes "after which the individual may experience panic symptoms and the realization that the distorted perceptions were false".

In the Cambodian, Laotian and Thai culture, sleep paralysis is referred to as "pee umm" and "khmout sukkhot". It describes an event where the person is sleeping and dreams that ghostly figure(s) are either holding him/her down or the ghosts can just be near. The person usually thinks that they are awake but is unable to move or make any noises. This is not to be confused with "pee khao" and "khmout jool" which refers to a ghost possession.

In Hmong culture, sleep paralysis describes an experience called "dab tsog" or "crushing demon" from the compound phrase "dab" (demon) and "tsog" (crush). Often the sufferer claims to be able to see a tiny figure, no larger than a child, sitting on his or her chest. What is alarming is that a vast number of American Hmong, mainly males, have died in their sleep prompting the Centers for Disease Control to create the term "Sudden Unexpected Nocturnal Death Syndrome" or "SUNDS" for short.

In Vietnamese culture, sleep paralysis is referred to as "ma de", meaning "held down by a ghost". Many people in this culture believe that a ghost has entered one's body, causing the paralyzed state.

In Chinese culture, sleep paralysis is known as "鬼壓身" (simplified: 鬼压身) (pinyin: guǐ yā shēn) or "鬼壓床" (simplified: 鬼压床) (pinyin: guǐ yā chuáng), which literally translate into "body pressured by a ghost" or "bed pressured by a ghost."

In Japanese culture, sleep paralysis is referred to as kanashibari (金縛り, literally "bound or fastened in metal," from kane "metal" and shibaru" to bind, to tie, to fasten"). This term is occasionally used by English speaking authors to refer to the phenomenon both in academic papers and in pop psych literature.

In Hungarian folk culture sleep paralysis is called "lidércnyomás" ("lidérc pressing") and can be attributed to a number of supernatural entities like "lidérc" (wraith), "boszorkány" (witch), "tündér" (fairy) or "ördögszerető" (demon lover). The word "boszorkány" itself stems from the Turkish root "bas-", meaning "to press".

In Iceland folk culture sleep paralysis is generally called having a "Mara". Mara is an old Icelandic word for a mare but has taken on the meaning for a sort of a devil that sits on ones chest at night, trying to suffocate the victim.

Kurdish people call this phenomenon a "mottaka", they believe that some one, in a form of a ghost or perhaps an evil spirit, turns up on top the of the person in the middle of the night and suffocates him/her. Apparently this happens usually when some one has done something bad.In New Guinea, people refer to this phenomenon as "Suk Ninmyo", believed to originate from sacred trees that use human essence to sustain its life. The trees are said to feed on human essence during night as to not disturb the human's daily life, but sometimes people wake unnaturally during the feeding, resulting in the paralysis.

In Turkish culture, sleep paralysis is often referred to as "karabasan" ("The dark presser/assailer"). It is believed to be a creature which attacks people in their sleep, pressing on their chest and stealing their breath.

In Mexico, it's believed that sleep paralysis is in fact the spirit of a dead person getting on the person and impeding movement, calling this "se me subió el muerto" (the dead person got on me).

In many parts of the Southern United States, the phenomenon is known as a "hag", and the event is said to often be a sign of an approaching tragedy or accident.

Ogun Oru is a traditional explanation for nocturnal disturbances among the Yoruba of Southwest Nigeria; ogun oru (nocturnal warefare) involves an acute night-time disturbance that is culturally attributed to demonic infiltration of the body and psyche during dreaming. Ogun oru is characterized by its occurrence, a female preponderance, the perception of an underlying feud between the sufferer's earthly spouse and a ;spiritual' spouse, and the event of bewitchment through eating while dreaming. The condition is believed to be treatable through Christian prayers or elaborate traditional rituals designed to exorcise the imbibed demonic elements.

In Zimbabwean Shona culture the word Madzikirira is used to refer something really pressing one down. This mostly refers to the spiritual world in which some spirit--especially an evil one--tries to use its victim for some evil purpose. The people believe that witches can only be people of close relations to be effective, and hence a witches often try to use one's spirit to bewitch one's relatives.

In Ethiopian culture the word Dukak is used. Dukak is believed to be some form of evil spirit that possesses people during their sleep. This experience is also believed to be related to use of Khat. Most Khat users experience sleep paralysis when quitting after a long time of use.In Ireland it is also known as "the hag." The expression originates from reports of an old woman that was believed to be seen near the sufferer during paralysis.

Several studies have shown that African-Americans may be predisposed to isolated sleep paralysis also known as "the witch is riding you," or "the haint is riding you." In addition, other studies have shown that African-Americans who have frequent episodes of isolated sleep paralysis, i.e., reporting having one or more sleep paralysis episodes per month coined as "sleep paralysis disorder," were predisposed to having panic attacks. This finding has been replicated by other independent researchers.